code: def __init__(self, opt):
      super(DifferentiableMockModel, self).__init__(opt)
  
      self.nn = nn.Linear(3, 3)
  
file_path: torch-points3d/test/mock_models.py
imports: from torch_points3d.models.base_model import BaseModel
  from torch import nn
label_desc: Use image node_id 1 to create a new DifferentiableMockModel object from inherited base classes: BaseModel with example: obj = DifferentiableMockModel(opt)